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R-4360 WASP MAJOR ENGINE

R-4360 Wasp Major Engine

Pratt & Whitney's last radial piston engine was the 28-cylinder Wasp Major.

The largest piston engine the company produced, it displaced 4,360 cubic inches. Growth models developed ratings up to 4,300 horsepower.

The engine was configured with four rows of cylinders arranged in a spiral to enhance cooling. Its primary application was heavy transports and bombers. Four Wasp Majors powered Boeing's giant, double-decked Stratocruiser, the 377. An Air Force B-50, also powered by four Wasp Major engines, was the first airplane to fly nonstop around the globe, a feat made possible by aerial refueling.

Specs

  • Displacement:
    4,360 cubic inches
  • Revolutions per minute: 3,990-4,300
  • Weight: 3,482-3,870 pounds
  • First run: 1941
  • First flight: 1942
  • Production years: 1944-1955
  • Engines produced: 18,679

Airplanes Powered

  • Aero Sud-Est SE-2010
  • Boeing XB-44
  • Boeing B-50
  • Boeing C-97, Model 377
  • Boeing XF8B-1
  • Boeing B-377PG
  • Consolidated Vultee B-36
  • Consolidated Vultee XC-99
  • Convair A-41
  • Curtiss Wright XBTC-2
  • Douglas TB2D
  • Douglas C-74
  • Douglas C-124
  • Fairchild C-119 (R4Q)
  • Fairchild C-120
  • Goodyear F2G
  • Hughes XF-11
  • Hughes HFB-1
  • Lockheed R60-1
  • Martin AM-1,2
  • Martin JRM-2
  • Martin P4M
  • Northrop B-35
  • Republic XP-72
  • Republic XP-12